Sensor-Watch/watch-library/hardware/hal/src/hal_spi_m_sync.c

/**
 * \file
 *
 * \brief I/O SPI related functionality implementation.
 *
 * Copyright (c) 2014-2018 Microchip Technology Inc. and its subsidiaries.
 *
 * \asf_license_start
 *
 * \page License
 *
 * Subject to your compliance with these terms, you may use Microchip
 * software and any derivatives exclusively with Microchip products.
 * It is your responsibility to comply with third party license terms applicable
 * to your use of third party software (including open source software) that
 * may accompany Microchip software.
 *
 * THIS SOFTWARE IS SUPPLIED BY MICROCHIP "AS IS". NO WARRANTIES,
 * WHETHER EXPRESS, IMPLIED OR STATUTORY, APPLY TO THIS SOFTWARE,
 * INCLUDING ANY IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY,
 * AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT WILL MICROCHIP BE
 * LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE, INCIDENTAL OR CONSEQUENTIAL
 * LOSS, DAMAGE, COST OR EXPENSE OF ANY KIND WHATSOEVER RELATED TO THE
 * SOFTWARE, HOWEVER CAUSED, EVEN IF MICROCHIP HAS BEEN ADVISED OF THE
 * POSSIBILITY OR THE DAMAGES ARE FORESEEABLE.  TO THE FULLEST EXTENT
 * ALLOWED BY LAW, MICROCHIP'S TOTAL LIABILITY ON ALL CLAIMS IN ANY WAY
 * RELATED TO THIS SOFTWARE WILL NOT EXCEED THE AMOUNT OF FEES, IF ANY,
 * THAT YOU HAVE PAID DIRECTLY TO MICROCHIP FOR THIS SOFTWARE.
 *
 * \asf_license_stop
 *
 */

#include "hal_spi_m_sync.h"
#include <utils_assert.h>
#include <utils.h>

#ifdef __cplusplus
extern "C" {
#endif

/**
 * \brief Driver version
 */
#define SPI_M_SYNC_DRIVER_VERSION 0x00000001u

#define SPI_DEACTIVATE_NEXT 0x8000

static int32_t _spi_m_sync_io_write(struct io_descriptor *const io, const uint8_t *const buf, const uint16_t length);
static int32_t _spi_m_sync_io_read(struct io_descriptor *const io, uint8_t *const buf, const uint16_t length);

/**
 *  \brief Initialize the SPI HAL instance function pointer for HPL APIs.
 */
void spi_m_sync_set_func_ptr(struct spi_m_sync_descriptor *spi, void *const func)
{
	ASSERT(spi);
	spi->func = (struct _spi_m_sync_hpl_interface *)func;
}

int32_t spi_m_sync_init(struct spi_m_sync_descriptor *spi, void *const hw)
{
	int32_t rc = 0;
	ASSERT(spi && hw);
	spi->dev.prvt = (void *)hw;
	rc            = _spi_m_sync_init(&spi->dev, hw);

	if (rc < 0) {
		return rc;
	}

	spi->flags    = SPI_DEACTIVATE_NEXT;
	spi->io.read  = _spi_m_sync_io_read;
	spi->io.write = _spi_m_sync_io_write;

	return ERR_NONE;
}

void spi_m_sync_deinit(struct spi_m_sync_descriptor *spi)
{
	ASSERT(spi);
	_spi_m_sync_deinit(&spi->dev);
}

void spi_m_sync_enable(struct spi_m_sync_descriptor *spi)
{
	ASSERT(spi);
	_spi_m_sync_enable(&spi->dev);
}

void spi_m_sync_disable(struct spi_m_sync_descriptor *spi)
{
	ASSERT(spi);
	_spi_m_sync_disable(&spi->dev);
}

int32_t spi_m_sync_set_baudrate(struct spi_m_sync_descriptor *spi, const uint32_t baud_val)
{
	ASSERT(spi);
	return _spi_m_sync_set_baudrate(&spi->dev, baud_val);
}

int32_t spi_m_sync_set_mode(struct spi_m_sync_descriptor *spi, const enum spi_transfer_mode mode)
{
	ASSERT(spi);
	return _spi_m_sync_set_mode(&spi->dev, mode);
}

int32_t spi_m_sync_set_char_size(struct spi_m_sync_descriptor *spi, const enum spi_char_size char_size)
{
	ASSERT(spi);
	return _spi_m_sync_set_char_size(&spi->dev, char_size);
}

int32_t spi_m_sync_set_data_order(struct spi_m_sync_descriptor *spi, const enum spi_data_order dord)
{
	ASSERT(spi);
	return _spi_m_sync_set_data_order(&spi->dev, dord);
}

/** \brief Do SPI read in polling way
 *  For SPI master, activate CS, do send 0xFFs and read data, deactivate CS.
 *
 *  It blocks until all data read or error.
 *
 *  \param[in, out] spi Pointer to the HAL SPI instance.
 *  \param[out] buf Pointer to the buffer to store read data.
 *  \param[in] size Size of the data in number of characters.
 *  \return Operation status.
 *  \retval size Success.
 *  \retval >=0 Time out, with number of characters read.
 */
static int32_t _spi_m_sync_io_read(struct io_descriptor *io, uint8_t *buf, const uint16_t length)
{
	ASSERT(io);

	struct spi_m_sync_descriptor *spi = CONTAINER_OF(io, struct spi_m_sync_descriptor, io);
	struct spi_xfer               xfer;

	xfer.rxbuf = buf;
	xfer.txbuf = 0;
	xfer.size  = length;

	return spi_m_sync_transfer(spi, &xfer);
}

/** \brief Do SPI data write in polling way
 *  For SPI master, activate CS, do buffer send and deactivate CS. The data back
 *  is discarded.
 *
 *  The data read back is discarded.
 *
 *  It blocks until all data sent or error.
 *
 *  \param[in, out] spi Pointer to the HAL SPI instance.
 *  \param[in] p_xfer Pointer to the transfer information (\ref spi_transfer).
 *  \return Operation status.
 *  \retval size Success.
 *  \retval >=0 Timeout, with number of characters transferred.
 */
static int32_t _spi_m_sync_io_write(struct io_descriptor *const io, const uint8_t *const buf, const uint16_t length)
{
	ASSERT(io);

	struct spi_m_sync_descriptor *spi = CONTAINER_OF(io, struct spi_m_sync_descriptor, io);
	struct spi_xfer               xfer;

	xfer.rxbuf = 0;
	xfer.txbuf = (uint8_t *)buf;
	xfer.size  = length;

	return spi_m_sync_transfer(spi, &xfer);
}

int32_t spi_m_sync_transfer(struct spi_m_sync_descriptor *spi, const struct spi_xfer *p_xfer)
{
	struct spi_msg msg;

	ASSERT(spi && p_xfer);

	msg.txbuf = p_xfer->txbuf;
	msg.rxbuf = p_xfer->rxbuf;
	msg.size  = p_xfer->size;
	return _spi_m_sync_trans(&spi->dev, &msg);
}

int32_t spi_m_sync_get_io_descriptor(struct spi_m_sync_descriptor *const spi, struct io_descriptor **io)
{
	ASSERT(spi && io);
	*io = &spi->io;
	return 0;
}

uint32_t spi_m_sync_get_version(void)
{
	return SPI_M_SYNC_DRIVER_VERSION;
}

#ifdef __cplusplus
}
#endif